Understanding Momentary Push Button Switches: Wiring Guide & Functionality Explained

Discover how to wire and understand the functionality of momentary push button switches in this comprehensive guide. Learn about their applications in electrical engineering and DIY projects.


In the realm of electrical engineering and DIY projects, momentary push button switches play a crucial role in controlling various devices. This article aims to provide a comprehensive guide on how to wire a momentary push button switch and elucidate its functionality.

What is a Momentary Push Button Switch?

Before delving into wiring procedures, it’s essential to understand the fundamental concept of a momentary push button switch. A momentary push button switch, also known as a Automatic reset switch , is a type of switch that only maintains contact while it is being pressed. Once the button is released, the circuit connection is broken, returning to its original state. These switches are widely used in applications requiring temporary activation, such as doorbells, keyboards, and electronic instruments.

Wiring a Momentary Push Button Switch: Step-by-Step Guide

1. Gather Materials: Before starting the wiring process, ensure you have all the necessary materials, including the momentary push button switch, wires, soldering iron (if soldering is required), and any additional components as needed.

2. Identify Terminal Connections: Momentary push button switches typically have two or more terminals. Identify the terminals labeled as “NO” (Normally Open) and “COM” (Common) or any other labeled terminals if present. The “NO” terminal is where the circuit is completed when the button is pressed.

3. Prepare Wires: Cut and strip the wires to the appropriate length, ensuring they are long enough to reach the switch and connect to the circuit.

4. Connect Wires to Terminals: Depending on the circuit configuration, connect one wire to the “NO” terminal and the other wire to the “COM” terminal of the momentary push button switch. If additional terminals are present, follow the manufacturer’s instructions or circuit diagram.

5. Secure Connections: Once the wires are connected to the terminals, ensure they are securely fastened. If soldering is required, carefully solder the wires to the terminals, taking precautions to avoid overheating and damaging the switch.

6. Test the Circuit: Before finalizing the installation, test the circuit to ensure the momentary push button switch functions correctly. Press the button to verify that the circuit activates as expected when the button is pressed and deactivates when released.


In conclusion, momentary push button switches are essential components in various electronic and electrical applications, offering temporary activation and control functionality. By understanding how to wire these switches and their basic functionality, DIY enthusiasts and professionals alike can incorporate them effectively into their projects, enhancing versatility and usability.

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